GROVE CITY — Two people died in a fire this morning in the borough. The police department said a man and a woman died in the fire, but personal information is not being released at this time pending positive identification and family notification. The fire was at 432 McConnell St. at 3:12 a.m. A cause of the fire has not yet been determined and the incident is under investigation. State police fire marshalls have been called to investigate the fire, which caused substantial damage to the structure. Police and fire officials released no other information.